text: /*=========================================================================
   *
   *  Copyright NumFOCUS
   *
   *  Licensed under the Apache License, Version 2.0 (the "License");
   *  you may not use this file except in compliance with the License.
   *  You may obtain a copy of the License at
   *
   *         http://www.apache.org/licenses/LICENSE-2.0.txt
   *
   *  Unless required by applicable law or agreed to in writing, software
   *  distributed under the License is distributed on an "AS IS" BASIS,
   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *  See the License for the specific language governing permissions and
   *  limitations under the License.
   *
   *=========================================================================*/
  
  #include "itkPipelineMonitorImageFilter.h"
  #include "itkRandomImageSource.h"
  #include "itkStreamingImageFilter.h"
  
  int
  main(int argc, char * argv[])
  {
    if (argc != 2)
    {
      std::cerr << "Usage: " << argv[0] << " <NumberOfSplits>" << std::endl;
      return EXIT_FAILURE;
    }
    int numberOfSplits = std::stoi(argv[1]);
  
    constexpr unsigned int Dimension = 2;
    using PixelType = unsigned char;
    using ImageType = itk::Image<PixelType, Dimension>;
  
    using SourceType = itk::RandomImageSource<ImageType>;
    SourceType::Pointer source = SourceType::New();
    ImageType::SizeType size;
    size.Fill(numberOfSplits);
    source->SetSize(size);
  
    using MonitorFilterType = itk::PipelineMonitorImageFilter<ImageType>;
    MonitorFilterType::Pointer monitorFilter = MonitorFilterType::New();
    monitorFilter->SetInput(source->GetOutput());
    // If ITK was built with the Debug CMake configuration, the filter
    // automatically outputs status information to the console
    monitorFilter->DebugOn();
  
    using StreamingFilterType = itk::StreamingImageFilter<ImageType, ImageType>;
    StreamingFilterType::Pointer streamingFilter = StreamingFilterType::New();
    streamingFilter->SetInput(monitorFilter->GetOutput());
    streamingFilter->SetNumberOfStreamDivisions(numberOfSplits);
  
    try
    {
      streamingFilter->Update();
    }
    catch (itk::ExceptionObject & error)
    {
      std::cerr << "Error: " << error << std::endl;
      return EXIT_FAILURE;
    }
  
    std::cout << "The output LargestPossibleRegion is: " << streamingFilter->GetOutput()->GetLargestPossibleRegion()
              << std::endl;
    std::cout << std::endl;
  
    const MonitorFilterType::RegionVectorType updatedRequestedRegions = monitorFilter->GetUpdatedRequestedRegions();
    std::cout << "Updated RequestedRegions's:" << std::endl;
    for (const auto & updatedRequestedRegion : updatedRequestedRegions)
    {
      std::cout << "  " << updatedRequestedRegion << std::endl;
    }
  
    return EXIT_SUCCESS;
  }
  